CN102893061A - Device for converting rotational movement into translational movement - Google Patents

Device for converting rotational movement into translational movement Download PDF

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Publication number
CN102893061A
CN102893061A CN2010800645340A CN201080064534A CN102893061A CN 102893061 A CN102893061 A CN 102893061A CN 2010800645340 A CN2010800645340 A CN 2010800645340A CN 201080064534 A CN201080064534 A CN 201080064534A CN 102893061 A CN102893061 A CN 102893061A
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CN
China
Prior art keywords
roller
cam
rotation
bar
contact surface
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Granted
Application number
CN2010800645340A
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Chinese (zh)
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CN102893061B (en
Inventor
S.莱斯迪恩
S.索林
S.勒罗克斯
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Valeo Systemes de Controle Moteur SAS
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Valeo Systemes de Controle Moteur SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • F02M26/54—Rotary actuators, e.g. step motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18248—Crank and slide
    • Y10T74/18256—Slidable connections [e.g., scotch yoke]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide

Abstract

The invention relates to a device for converting a rotational movement into a translational movement, said device comprising: a first element (303) that is rotated around a stationary center of rotation (401) by a rotation means (301); a second element (307) that is translated along a translation axis (311) by rotating the first element (303); a cam (305) that is rigidly connected to the first element (303), said cam (305) having a cam channel (306) in which a roller (308) moves, wherein said roller is rigidly connected to the second element (307). Said device is characterized in that the cam channel (306) has an inner surface (402) for contact with the roller (308), said roller (308) being in contact (500) with the inner contact surface (402) when the first element (303) is rotated in a first rotational direction (404), said inner contact surface (402) defining a curve of the type developing from a circle.

Description

Being used for to rotatablely move is converted to the device of translational motion
Technical field
The present invention relates to be converted to for rotatablely moving the device of translational motion.The present invention relates generally to the mechanism of the All Drives actuator type that comprises such movement transforming device.
Common field of the present invention is driver actuator field, and its function is to be converted to the translational motion that intention causes mechanical part to move with translation mode by direct the rotatablely moving of driving of driver.
The actuator of the type is used for for example making EGR (EGR) the type valves motion in so-called EGR loop.Such loop mainly is used in the diesel engine, with by a part of exhaust being introduced again the amount of the pollutant in the exhaust that reduces motor vehicle in the motor.Therefore, under this background, the mixture of the inert gas that the exhaust after inert gas or the burning that regained by the outlet port at combustion chamber consists of is reintroduced to air inlet duct and enters subsequently the combustion chamber of motor.The amount that is reintroduced to the exhaust after the burning in the air inlet loop is controlled by the EGR valve, the conduit that the exhaust air flow of described EGR valve after degree is more or less blocked burning passed through.Movement transforming device of the present invention is suitable for the EGR valve fully, but obviously can use with any driver, its at least one function is to be converted to translational motion with rotatablely moving, for example, and bypass, valve or the square clack valve of control intention translational motion or the actuator of fly valve type element.
Background technique
In the prior art, the device that is converted to translational motion with rotatablely moving mainly contains two kinds of known types.
The operation of the device of the first kind is shown in Figure 1.In the figure, show to summary the device 100 to rotatablely move and be converted to translational motion of being used for that is in primary importance 110 and the second place 111.Device 100 mainly comprises:
-form the first bar 101 of chaining part, be designed to rotatablely move around fixing spin axis 103, described rotation is by unshowned driver drives;
The-the second bar 102 is designed to carry out translational motion along the translation direction 106 perpendicular to described spin axis 103; The translational motion of the second bar 102 produces by the straight opening 104 of the formation guide of existence in the first bar 101, and the roller 105 that is fixed to the second bar 102 can move in this opening.By causing the rotation of the first bar 101, driver drives roller 105 moves in guide 104, therefore causes the translational motion of the second bar 102.
In the device of this first kind, the distance D 1 between translation direction 106 and the spin axis 103 is constant.Thereby the lever arm corresponding with the distance D 2 between the position of spin axis 103 and roller 105 changes according to the position of the first bar 101.Therefore observe the differentiation of the direction of power F1 during the rotation of the first bar 101; The variation of the direction of power F1 causes the generation of the mechanical force moment on the second bar 102, and it increases the friction on the guide 104 of the first bar 101.Along with roller 105 moves away from spin axis 103, because the rotation of the first bar 101 develops, power F1 is along the direction that more and more deviates from the direction of translated axis line 106.Therefore, the thrust on translated axis line 106 is fewer and feweri, and the power that driver produces causes more and more not having effect aspect the thrust of the second bar 102 translational motions in intention.Therefore, in the device of this first kind, observe the Fast Wearing of each element (especially guide 104 and roller 105), and the energy of driver supply is not used optimally.
The operation of the prior-art devices of the Second Type that being used for to rotatablely move is converted to translational motion is shown in Figure 2.In the figure, show to summary the device 200 to rotatablely move and be converted to translational motion of being used for that is in primary importance 210 and the second place 211.Device 200 mainly comprises:
-form the first bar 201 of chaining part, be designed to rotatablely move around fixing spin axis 203, described rotation is by unshowned driver drives;
The-the second bar 202 is designed to carry out translational motion along the translation direction 206 perpendicular to described spin axis 203; The supporting member 204 that the translational motion of the second bar 202 is existed by the level place on the top of the second bar 202 and producing, the end 205 of the first bar 201 is carried on the level place of supporting member 204, thereby in the example that the first bar 201(is being considered) driven being rotated along clockwise direction when moving, the second bar 202 is caused doing translational motion downwards.Supporting member 204 is replenished by upper-part 207, the end 205 of the first bar 201 is carried on the upper-part 207, thereby when (in the example of considering herein) first bar 201 was rotated motion in the counterclockwise direction, the second bar 202 was caused rising along translated axis line 206.
In the device of this Second Type, the power that is applied to supporting member 204 or upper-part 207 is not constant, and moment of torsion produces at the level place of upper-part 207 or supporting member 204, the power that is applied by end 205 develops along with motion and becomes more and more from axle, shown in the arrow 208 of the direction that promoted end 205 by indication, pushing direction 208 no longer overlaps with the core of the second bar 202.Such moment of torsion has the consequence of supporting member 204 wearing and tearing especially.
Therefore dissimilar device is so that can not provide such solution: the constant force that is provided being designed to carry out the contact on the second bar of translational motion by element or the first bar is orientated at the axis of described the second bar, does not produce moment of torsion on the bearing area of the second bar and the contact surface between the contact member.
Summary of the invention
Method of the present invention has proposed solution to the problem of just having stated.The present invention proposes a kind of device, this device has motion conversion law, for become translational motion from rotatablely moving, so that on all position ranges that the rotary moving element that drives the translation movable component covers, can obtain constant force, described constant force is applied to the position of described translation movable component at least, described power is oriented to as close as possible associated shift direction, is centered on the axis of shift element.Therefore, the power that produces mechanical force moment in shift element is minimized, and the efficient of movement conversion mechanism is optimised thus.
For this reason, the present invention proposes to use cam, and described cam has the cam path of given shape, and described cam is fixed to rotatable member, and shift element is fixed to the parts that move in the cam path of given shape.According to the present invention, the position of at least one in its edge of the given shape in associated cams path is the type of coming from the circle development.
Therefore the present invention relates generally to for rotatablely moving and is converted to the device of translational motion, and described device comprises:
The-the first element, being driven in rotation device drive is around fixedly rotating center rotation;
The-the second element is along the translated axis line translation by the rotary actuation of the first element;
-cam is fixed to the first element, and described cam has cam path, and the roller that is fixed to the second element moves in this cam path;
It is characterized in that, cam path has and surface, the inside of roller-contact, and when the first element is driven to when rotate along the first sense of rotation, described roller contact Surface Contact with this inside, and described inner contact surface limits from the curve of the round type that develops.
Device of the present invention except already mentioned major character in aforementioned paragraphs, can also have following one or more supplementary features:
The curve of-the type come from circle development has the original radius that equals the distance observed between rotating center and translated axis line;
-cam path has the external contact surface, when the first element is driven to when rotating along the second sense of rotation this external contact surface and roller-contact;
-external contact surface limits specific curves, and each point of contact this curve and roller-contact has and is orthogonal to described direction of curve, and described orthogonal direction overlaps with translated axis line.
The various supplementary features of device of the present invention, on their not mutually exclusive degree, the combination by all possible association is to obtain different embodiments of the invention.
The invention still further relates to the actuator that comprises the device that will be converted to translational motion for rotatablely moving of the present invention.
The various application of the present invention and it will read following describe and study accompanying drawing after be better understood.
Description of drawings
Following view only provides by explaination, and never limits the present invention.Accompanying drawing illustrates:
Be the first kind prior-art devices of having described among Fig. 1, the conversion of the translational motion that rotatablely moves is provided;
Be the Second Type prior-art devices of having described among Fig. 2, the conversion of the translational motion that rotatablely moves is provided;
It is the view of actuator that comprises the example of device of the present invention among Fig. 3;
It is the summary view of the cam path that in an example of device of the present invention, operates among Fig. 4;
The different summary views of determining of the shape of the cam path that operates among the embodiment of explanation from apparatus of the present invention of Fig. 4 among Fig. 5.
Embodiment
The element that appears among the different figure will keep identical reference character, unless otherwise noted.
Fig. 3 illustrates valve 300, and it is EGR valve actuator type in the example shown, comprising:
-driving element 301, being suitable for driving first has gear 302 rotations;
There is gear 310-centre, has gear 302 to drive rotation by first;
The first element 303 of the example of-device of the present invention, described the first element has the mechanical parts of toothed portion 304 to consist of at this by having, described have toothed portion 304 with the centre gear 310 formative gear driving mechanisms to be arranged, and is driven in rotation during with convenient driving element 301 activity;
-cam 305 is fixed to the first element 303; Therefore when driving element 301 activity, cam 305 is caused rotation; Cam 305 has cam path 306;
The second element 307 of the example of-device of the present invention, described the second element 307 is made of the mechanical parts that are the form of bar at this, described bar has roller type part 308, and this roller type part 308 is suitable for motion in cam path 306 when the first element 303 moves to rotatablely move; The motion of cam path 306 is carried out moving of translational motion via roller 308 driveshafts 307 along translated axis line 311.In order to increase the stability of bar 307, in EGR valve actuator 300, in consisting of the material of valve actuator 300, be advantageously provided porosely 309, described hole allows bar 307 to slide during translational motion.
Fig. 4 is illustrated in the synoptic diagram of the part of the cam path 306 that operates in the device of the present invention.Fig. 4 is described together with Fig. 5, and Fig. 5 illustrates the determining of shape of the cam path 306 of apparatus of the present invention.
In Fig. 4, the part of the rotating center that rotatablely moves 401 and the cam path 306 of the first element 303 has been shown, the motion of this cam path is by the rotary actuation of described the first element 303 and cause roller 308 with respect to the motion of cam path 306.In the example of considering herein, cam path 306 has the surface, inside 402 that limits the first curve and the outer surface 403 that limits the second curve.By the surface of inner surface 402 being appointed as close the rotating center 401 in two relevant surfaces so that inner surface 402 differentiates outer surface 403 so be away from the surface of rotating center 401 in two relevant surfaces with outer surface 403.
Inner surface 402 is made of the surface with roller-contact, is at least when the rotation of the first element 303 is observed along the first sense of rotation 404; In the example shown, when the first element 303 turned clockwise, inner surface 402 and roller-contact drove roller 308, and therefore the second element 307 translational motion downwards by be applied to thrust on the roller 308 by described inner surface 402.
According to the present invention, inner surface 402 has the shape of particular curve, and it is the type of coming from the circle development.Such curve has the parameter cartesian equation of following form, is called standard quadrature reference system:
x ( t ) = a × ( cos ( t ) + t × sin ( t ) ) y ( t ) = a × ( sin ( t ) - t × cos ( t ) )
Wherein, aThe original radius from the relevant round type that develops, wherein, tIt is the parameter of parametric equation.
By proposing curve with such shape, according to the present invention, obtained motion conversion law, it is so that not only can obtain constant force at all range of movement of the first element 303, described power is also along the direction orientation of the translated axis line 208 of the second element 307, this so that the power that produces moment and reduced mechanism efficiency at bar be minimized.These physical features come from, by inner surperficial 402 shape being proposed be the curve from the next type of circle development, all rotating ranges (as visible for primary importance 501, the second place 502 and the 3rd position 503) for the first element 303, the dead in line of the normal in the position of point of contact 500 of curve (in Fig. 5 as seen) and bar 307, and therefore, overlap with translated axis line 311.Therefore, the power that is delivered to bar 307 via roller 508 no longer is the component of moment of torsion, but resultant of vector, and its orientation is the orientation of the axis of bar 307.
In the present invention, cam path 306 advantageously comprises external contact surface 403, and forming the boundary curve, this curve is to turn back to the initial position of bar 307 feasible; When the first element 303 was driven in rotation along the sense of rotation opposite with sense of rotation 404, external contact surface 403 contacted with roller 308.In advantageous embodiment, external contact surface 403 limits specific curves, on this curve, each point of contact 505 that contacts with roller 308 has the direction 506 that is orthogonal to curve 403, all rotating ranges for the first element 303, the dead in line of described orthogonal direction 506 and bar 307, and therefore, overlap with translated axis line 311.

Claims (5)

1. one kind is used for rotatablely moving being converted to the device of translational motion, and described device comprises:
The-the first element (303), being driven in rotation device (301) driving is around fixedly rotating center (401) rotation;
The-the second element (307) is along translated axis line (311) translation by the rotary actuation of the first element (303);
-cam (305) is fixed to the first element (303), and described cam (305) has cam path (306), and the roller (308) that is fixed to the second element (307) moves in this cam path (306);
It is characterized in that, cam path (306) has the surface, inside (402) that contacts with roller (308), when the first element (303) is driven to when rotating along the first sense of rotation (404), described roller (308) contacts (500) with inner contact surface (402), and described inner contact surface (402) limits from the curve of the next type of circle development.
2. according to the described device of last claim, it is characterized in that, the curve of the type of coming from the circle development has the original radius that equals the distance observed between rotating center (401) and translated axis line (311).
3. according to each the described device in the aforementioned claim, it is characterized in that, cam path (306) has external contact surface (403), when the first element (303) is driven to when rotating along the second sense of rotation, this external contact surface (403) contacts (505) with roller (308).
4. according to last the described device of claim, it is characterized in that, external contact surface (403) limits specific curves, each point of contact (505) that contacts with roller (308) of this curve has the direction (506) that is orthogonal to described specific curves, and described orthogonal direction (506) overlaps with the translated axis line (311) of the second element (307).
5. an actuator (300) comprises according to each the described device of translational motion that is converted to for rotatablely moving in the aforementioned claim.
CN201080064534.0A 2009-12-22 2010-12-22 For rotary motion being converted to the device of translational motion Expired - Fee Related CN102893061B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR09/06236 2009-12-22
FR0906236A FR2967472B1 (en) 2009-12-22 2009-12-22 DEVICE FOR TRANSFORMING A ROTATION MOVEMENT INTO A TRANSLATION MOVEMENT
PCT/EP2010/070596 WO2011076902A1 (en) 2009-12-22 2010-12-22 Device for converting rotational movement into translational movement

Publications (2)

Publication Number Publication Date
CN102893061A true CN102893061A (en) 2013-01-23
CN102893061B CN102893061B (en) 2015-11-25

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US (1) US8746094B2 (en)
EP (1) EP2516891B1 (en)
KR (1) KR101776349B1 (en)
CN (1) CN102893061B (en)
FR (1) FR2967472B1 (en)
WO (1) WO2011076902A1 (en)

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CN107013738A (en) * 2017-04-24 2017-08-04 湖州师范学院 A kind of ball valve mechanism for following closely pin brake band displacement monitoring
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CN108351042A (en) * 2015-09-18 2018-07-31 法雷奥电机控制系统公司 For by the device of the translational motion for being converted into sliding part of pinion gear and including the valve of this device

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FR2914975A1 (en) * 2007-04-16 2008-10-17 Valeo Sys Controle Moteur Sas DEVICE FOR TRANSFORMING A PIVOT MOTION OF A GEAR INTO A TRANSLATION MOVEMENT OF A SLIDER AND VALVE COMPRISING SUCH A DEVICE

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104006132A (en) * 2013-02-11 2014-08-27 通用电气公司 System and method for actuation of power panel
CN104006132B (en) * 2013-02-11 2017-08-29 通用电气公司 System and method for motive power panel
CN108351042A (en) * 2015-09-18 2018-07-31 法雷奥电机控制系统公司 For by the device of the translational motion for being converted into sliding part of pinion gear and including the valve of this device
CN108351042B (en) * 2015-09-18 2020-03-10 法雷奥电机控制系统公司 Device for converting a pivoting movement of a pinion into a translational movement of a slide
CN106969154A (en) * 2017-03-29 2017-07-21 湖州师范学院 One kind rotation nail braking cork current governor motion
CN107013738A (en) * 2017-04-24 2017-08-04 湖州师范学院 A kind of ball valve mechanism for following closely pin brake band displacement monitoring
CN107131308A (en) * 2017-04-24 2017-09-05 湖州师范学院 A kind of supersonic sounding of self-locking and braking automatically controls ball valve mechanism

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FR2967472B1 (en) 2015-12-25
EP2516891A1 (en) 2012-10-31
KR20120092720A (en) 2012-08-21
EP2516891B1 (en) 2015-04-29
CN102893061B (en) 2015-11-25
US20120312107A1 (en) 2012-12-13
WO2011076902A1 (en) 2011-06-30
FR2967472A1 (en) 2012-05-18
KR101776349B1 (en) 2017-09-07
US8746094B2 (en) 2014-06-10

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